读图,完成下列小题。若图中丁地为极昼时,图中四地正午太阳高度由大到小的正确排序是( )
图中四地自转线速度由大到小的正确排序是( )
—At present, one of the best ways to study is working in groups. —More chances ___________ to students to learn from each other.
Many nice books______ the children on Children’s Day. A. gave B. were gave C. were given to
The child without parents ________ good care of by his teachers in this special school.
—Has David finished his project yet? —I guess not. He on it at lunchtime. Do you want me to confirm it?
At this time yesterday afternoon, I____ my bike in the street. A. rode B. is riding C. was riding